如何以编程方式检查 iOS 应用程序中是否存在键盘?

问题描述:

我需要在我的 iOS 应用中检查键盘可见性的情况.

I need to check the condition of keyboard visibility in my iOS app.

伪代码:

if(keyboardIsPresentOnWindow) {
    //Do action 1
}
else if (keyboardIsNotPresentOnWindow) {
    //Do action 2
}

我如何检查这种情况?

...或采取简单的方法:

…or take the easy way:

当您输入 textField 时,它会成为第一响应者并出现键盘.您可以使用 [myTextField isFirstResponder] 检查键盘的状态.如果返回YES,则键盘处于活动状态.

When you enter a textField, it becomes first responder and the keyboard appears. You can check the status of the keyboard with [myTextField isFirstResponder]. If it returns YES, then the the keyboard is active.